The influence of the surroundings on the interaction between electromagnetic (EM) waves and biological tissue is examined by schematizing the environment by a perfectly conducting screen placed beyond the irradiated tissue. The effects of standing waves, which are created in this situation, are determined as a function of the electrical and geometrical parameters of the structure. In particular, the hazard increase due to the presence of the screen combined with a phase disuniformity of the incident field--an elementary schematization of the "near-field"--is pointed out.
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Bernardi et al. (1976) studied this question.
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